WALNUT APHIDES IN CALIFORNIA. 47 
BIBLIOGRAPHY. 
Chromaphis juglandicola Kaltenbach. 
1843. Kaltenbach, J. H. Monographic der Familien der Pflanzenlause . . . Aachen, 
1843. 
"Lachnus juglandicola." Original description, with colored figures. 
1857. Koch, C. L. Die Pflanzenlause Aphiden, Nurnberg, 1854-1857. 
" Callipterus juglandicola Koch," p. 224, fig. 297, 1857. Description and colored figures. 
1860. Passerini, Carlo. Gli Afidi, Parma, 1860. 
" Callipterus juglandicola Kalt." recorded. 
1870. Walker, Francis. Notes on aphides. Zoologist, ser. 2, v. 5, pp. 1996-2001, 
Feb., 1870. 
" Callipterus juglandis," p. 2000; Callaphis proposed, p. 2000. " Chromaphis peglandicola," 
p. 2001. Genus Chromaphis erected. 
1881. Buckton, G. W. Monograph of the British Aphides, v. 3, London, 1881. 
" Pterocallis juglandicola Kalt.," p. 32-34. Description and colored plate. 
1906. Schouteden, H. Catalogue des Aphides de Belgique. Mem. Soc. Ent. Belg., 
v. 12, pp. 189-246. 
" Callipterus juglandicola Kalt.," p. 209-210. Recorded. 
1909. Essig, E.. O. Aphididse of southern California, II. Pomona Col. Jour. Ent., 
v. 1, no. 2, pp. 47-52, June, 1909. 
" Callipterus juglandicola Koch," p. 51-52. Description and figures. 
1910. Gillette, C. P. Plant-louse notes, family Aphididse (continued). Jour. Econ. 
Ent., v. 3, no. 4, pp. 367-371, pi. 24. 
" Chromaphis juglandicola,' ' p. 367, fig. 4. Note of occurrence and figure of antenna of 
winged female. 
1910. Wilson, H. F. A key to the genera and notes on the synonymy of the tribe 
Callipterini, family Aphididse. Canad. Ent., v. 42, no. 8, pp. 253-259, 
Aug., 1910. 
" Chromaphis juglandicola Kalt.," pp. 257-258. Refers to Walker's erection of the genus 
Chromaphis. 
1912. Essig, E. O. The walnut plant louse (Chromaphis juglandicola (Kalt.) Walker). 
Mo. Bui. Cal. State Com. Hort., v. 1, no. 5, pp. 190-194, figs. 72-73, April, 
1912. 
Description and figures, natural control notes. 
1913. Wilson, H. F., and Lovett, A. L. Miscellaneous insect pests of orchard and 
garden. Bien. Crop Pest and Hort. Rpt. 1911-12, Oregon Agr. Col. Expt. 
Sta., pp. 147-165. 
" Chromaphis juglandicola Kalt.," p. 165. Note of occurrence and remedies. 
MONELLIA CARY^E Monell. 
1879. Monell, J. Notes on the Aphididse of the United States, Part II. Notes on 
Aphididse, with descriptions of new species. U. S. Geol. and Geog. Sur- 
vey Bui. 5, no. 1, pp. 18-32, Jan. 22, 1879. 
" Callipterus caryse, n. sp.," p. 31. Original description. 
1879. Thomas, Cyrus. Eighth Report of the State Entomologist on the Noxious and 
Beneficial Insects of the State of Illinois, Springfield, 1879, 
" Callipterus caryse, n. sp.," p. 199. Note of occurrence. 
